SPectral class
Spectral class is a way to classify stars by their temperatures.
O
- 30,000 - 60,000 K
- Blue Stars
B
- 10,000 - 30,000 K
- Blue-White Stars
A
- 7,500 - 10,000 K
- White Stars
F
- 6,000 - 7,500 K
- Yellow-White Stars
G
- 5,000 - 6,000 K
- Yellow Stars
K
- 3,500 - 5,000K
- Yellow-Orange Stars
M
- < 3,500 K
- Red Stars